Method and Apparatus for Migrating Seamlessly in a Wireless Communication System

1. A wireless communication system comprising: a transmitter for transmitting a data information by one of first and second channels, said first channel having a first center frequency defining an initial frequency, said second channel having a second center frequency defining a target frequency; and a client terminal for receiving said data information via said first channel, said transmitter and said client terminal being operable at a first and second working frequencies respectively, each of said first and second working frequencies being equivalent to said initial frequency wherein said transmitter migrate from said first channel to said second channel, said first working frequency adding an offset frequency on said transmitter, said second working frequency adjusted the same with said first working frequency, and said transmitter adding said offset frequency repetitively till said second working frequency equivalent to said target frequency.

2. The wireless communication system according to claim 1 , wherein said offset frequency is smaller than the maximum value of overlapping frequency between said first and second channels cooperatively.

3. The wireless communication system according to claim 2 , wherein said offset frequency is defined by the difference between said target and initial frequencies cooperatively divided by a first integer “N”.

4. The wireless communication system according to claim 3 , further comprising adding the value of said first integer when said client terminal is unable to receive the data information due correctly by said first working frequency adding said offset frequency.

5. The wireless communication system according to claim 1 , further comprising a remote control for switching said first channel of said transmitter into said second channel.

6. The wireless communication system according to claim 1 , wherein said first and second channels are located adjacent to each other.

7. The wireless communication system according to claim 1 , wherein transmission of said data information from said transmitter to said client terminal is continued seamlessly during said first working frequency adding said off-set frequency.

8. The wireless communication system according to claim 1 , wherein said client terminal includes a display, said data information being an image data information to be displayed over said display device after being processed, transmission of said image data information being continued seamlessly during switching from said first working frequency to said second working frequency.

9. A channel switching method of a wireless communication system that transmit a data information in one of first and second channels from an transmitter to a client terminal, said first channel having a first center frequency defining an initial frequency, said second channel having a second center frequency defining an target frequency, said transmitter and said client terminal being operated at first and second working frequencies respectively, each of said first and second working frequencies being equivalent to said initial frequency, the channel switching method comprising: (1) transmitting a switch command by a user; (2) the transmitter receiving the switch command and transmitting a UDP (user data protocol) to the client terminal in order to switch of said first working frequency to said target frequency; (3) adding an offset frequency to said first working frequency of said transmitter and consequently informing said client terminal; (4) said client terminal adjusting said second working frequency to be consistent with said first working frequency of said transmitter; (5) said client terminal transmitting a data package to said transmitter; (6) the transmitter receiving said data package and comparing to whether said first working frequency of said transmitter is equivalent to the target frequency; (7) repeating the steps (3) to (6) in case said first working frequency of said transmitter is not equivalent to the target frequency; and (8) stopping the channel switching operation once said first working frequency of said transmitter is equivalent to the target frequency.

10. The channel switching method according to claim 9 , wherein said offset frequency is smaller than the maximum value of overlapping frequency between said first and second channels cooperatively.

11. The channel switching method according to claim 10 , wherein said offset frequency is defined by the difference between said target and initial frequencies cooperatively divided by a first integer “N”.

12. The channel switching method according to claim 11 , wherein in the steps (3) and (4), further comprises a step of adding the value of said first integer when said client terminal is unable to receive the correct data information due to said first working frequency adding said offset frequency.

13. The channel switching method according to claim 9 , wherein said switch command is to switch the first channel into the second channel.

14. The channel switching method according to claim 9 , wherein transmission of said data information from said transmitter to said client terminal is continued seamlessly during above said steps.

15. The channel switching method according to claim 9 , wherein the first and second channels are located adjacent to each other.

16. The channel switching method according to claim 9 , wherein in the step (7), said first working frequency of said transmitter adding the offset frequency and second working frequency being adjusted in such a manner to be consistent with the new first working frequency of said transmitter, and the transmitter comparing said new first working frequency is equivalent to the target frequency and repeating the step (7) until said first working frequency is equivalent to the target frequency.